225637513 has 2 divisors, whose sum is σ = 225637514. Its totient is φ = 225637512.

The previous prime is 225637457. The next prime is 225637537. The reversal of 225637513 is 315736522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210482064 + 15155449 = 14508^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 225637513 - 2⁹ = 225637001 is a prime.

It is not a weakly prime, because it can be changed into another prime (225607513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112818756 + 112818757.

It is an arithmetic number, because the mean of its divisors is an integer number (112818757).

Almost surely, 2^225637513 is an apocalyptic number.

It is an amenable number.

225637513 is a deficient number, since it is larger than the sum of its proper divisors (1).

225637513 is an equidigital number, since it uses as much as digits as its factorization.

225637513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 225637513 is about 15021.2354019235. The cubic root of 225637513 is about 608.7940997726.

Subtracting 225637513 from its reverse (315736522), we obtain a palindrome (90099009).

The spelling of 225637513 in words is "two hundred twenty-five million, six hundred thirty-seven thousand, five hundred thirteen".